2016 MLB Relative Power Index (RPI),as of the games of September 4,2016 from ESPN.GO.COM

MLB RPI Rankings

RK	TEAM	RPI	W	L	PCT	SOS	PWR	RS	RA	EXPW-L	EXPWP
1	Chicago Cubs	.532	88	48	.647	.493	0	684	460	94-42	.689
2	Texas Rangers	.531	82	55	.599	.508	0	663	632	72-65	.524
3	Toronto Blue Jays	.521	77	59	.566	.506	0	666	565	79-57	.581
4	Cleveland Indians	.521	79	56	.585	.500	0	666	562	79-56	.584
5	Baltimore Orioles	.519	74	62	.544	.510	0	636	622	70-66	.511
6	Boston Red Sox	.518	76	60	.559	.504	0	751	608	82-54	.604
7	Washington Nationals	.516	79	57	.581	.494	0	646	508	84-52	.618
8	Detroit Tigers	.514	74	62	.544	.504	0	632	609	71-65	.519
9	Kansas City Royals	.510	70	66	.515	.509	0	552	568	66-70	.486
10	New York Yankees	.510	70	65	.519	.507	0	572	589	66-69	.485
11	Houston Astros	.509	72	64	.529	.502	0	625	583	73-63	.535
12	Los Angeles Dodgers	.507	76	60	.559	.489	0	610	548	75-61	.553
13	Seattle Mariners	.506	69	67	.507	.506	0	627	614	69-67	.510
14	San Francisco Giants	.503	73	63	.537	.492	0	603	542	75-61	.553
15	St. Louis Cardinals	.502	71	64	.526	.495	0	658	585	75-60	.559
16	New York Mets	.502	71	66	.518	.497	0	536	526	70-67	.509
17	Chicago White Sox	.499	65	71	.478	.506	0	567	606	63-73	.467
18	Pittsburgh Pirates	.498	67	67	.500	.497	0	597	603	66-68	.495
19	Los Angeles Angels	.494	61	75	.449	.509	0	614	631	66-70	.486
20	Miami Marlins	.492	68	69	.496	.491	0	564	568	68-69	.496
21	Colorado Rockies	.491	65	71	.478	.495	0	732	709	70-66	.516
22	Tampa Bay Rays	.490	58	77	.430	.510	0	573	590	66-69	.485
23	Oakland Athletics	.488	58	78	.426	.509	0	529	648	54-82	.400
24	Cincinnati Reds	.481	57	78	.422	.500	0	601	718	56-79	.412
25	Philadelphia Phillies	.479	60	76	.441	.492	0	500	652	50-86	.370
26	Milwaukee Brewers	.478	60	76	.441	.490	0	560	630	60-76	.441
27	Arizona Diamondbacks	.476	58	78	.426	.493	0	630	765	55-81	.404
28	San Diego Padres	.474	56	80	.412	.495	0	580	664	59-77	.433
29	Minnesota Twins	.472	51	86	.372	.505	0	637	764	56-81	.410
30	Atlanta Braves	.468	54	83	.394	.493	0	525	667	52-85	.383

Glossary

• W: Wins
• L: Losses
• PCT: Winning percentage
• RPI: Relative Power Index+
• SOS: Strength of schedule

• PWR: ESPN Power Ranking
• RS: Runs scored
• RA: Runs allowed
• EXW-L: Expected W-L*
• EXWP: Expected winning percentage*

+The basic formula is 25% team winning percentage, 50% opponents' average winning percentage, and 25% opponents' opponents' average winning percentage.
*ExW-L and ExWP are derived from Bill James' Pythagorean theorem of baseball: Runs scored [squared] / (Runs scored [squared] + runs allowed [squared]). This formula was designed to relate a team's runs scored and runs allowed to its won-lost record.